An appellate court affirmed a federal trial court judgment from 2014 stating that Buyer’s Products infringed upon Douglas Dynamics patents, according to Douglas Dynamics.

“Our company has always maintained an exceptional commitment to engineering, and we consider our intellectual property a valuable asset which we will diligently defend,” said Chairman, President and CEO Jim Janik. “We are pleased the decision was upheld and remain committed to consistently producing the most innovative, highest quality and most reliable attachments and equipment on the market.”

In January, the Court of Appeals for the Federal Circuit affirmed the 2014 decision of the trial court in Douglas Dynamics LLC v. Buyers Products Co. It awarded Douglas damages for Buyers Products’ infringement.

Previously, the same court ruled that Buyers Products, which offers the SnowDogg line of snow removal equipment, couldn’t sell products that the courts found to infringe Douglas Dynamics’ patents.